Bottle cap
Bottle caps are used to seal the opening of bottles. For glass bottles, these are usually small, specially adapted pieces of metal. With plastic bottles, plastic caps are used instead.
The original bottle cap was called Crown cork. It is pressed onto the bottle, and can be removed, using a bottle opener.
In recent years bottle caps with screw on mounts are used that way, a bottle opener is no longer required. Caps for plastic bottles are often made of a different type of plastic from the bottle.
A cork is another type of closure for the top of a bottle.
Bottle Cap Media
Plastic screw caps for bottles
A portrait of William Saroyan made of plastic bottle caps in Yerevan, Armenia
An opened "flip-top" bottle
A pair of bottles with flip-top closures
Flensburger Pilsner
Plastic bottle screw cap used to seal a plastic bottle.
A "sports cap" made of plastic, as seen on many water bottles, here seen in closed configuration.
Same sports cap in open mode, allowing the liquid to pass around the central blue piece.
A recloseable wire, ceramic, and rubber bottle clasp, from a German mineral water bottle.
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Other websites
Media related to Bottle caps at Wikimedia Commons
